PS101 Siliconate Multi-Surface (Smooth) WB Penetrating Sealer (5 gal.) Zero VOC, Water Based Sealer & Curing Agent for All Smooth Porous Concrete & Masonry. Combats Freeze/ Thaw, Repels Water & Moisture. Limits Stains & Molds, Makes Easier to Clean. Resists Salts & Deicing Chemicals, Decreases Efflorescence & Dusting. Reduces Scaling & Spalling, Maintains Traction.